SignalPrep
Basic Qualification · B-008 Interference and suppression · B-008-002-001

Quels composants pourraient servir à réduire ou éliminer le brouillage d'un émetteur HF à une chaîne audiovisuelle domestique?

  1. ADes varistors à oxyde métallique
  2. BDes bobines de découplage ("bypass")
  3. CDes bobines sur noyau de ferrite
  4. DDes résistances de découplage ("bypass")

Correct answer: C — Des bobines sur noyau de ferrite. Question tirée de la banque officielle d'ISDE.

Why

Coils on ferrite cores act as a choke that blocks high-frequency radio energy from travelling along power or audio cables into your home entertainment system, while still letting normal electricity and sound pass through. The full explanation — and one for every question — is in Pro.

Practise this section

Interference and suppression is section B-008 of the Basic exam: When things interfere: harmonics, overload, RFI to and from your station, filters, ferrites and how to fix the neighbour's TV.

Drill B-008 — free, no account

This question in English · All B-008 questions